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Smoking around your kindergartner could raise their blood pressure

American Heart Association rapid access journal report

2011-01-11
(Press-News.org) If you smoke around your children, they could have high blood pressure or be headed in an unhealthy direction before learning their ABC's, according to research reported in Circulation: Journal of the American Heart Association. The study is the first to show that breathing tobacco smoke increases the blood pressure of children as young as 4 or 5 years old. "The prevention of adult diseases like stroke or heart attack begins during childhood," said Giacomo D. Simonetti, M.D., first author of the study at the University of Heidelberg in Germany and currently assistant professor of pediatrics at the Children's Hospital of the University of Berne in Switzerland. "Parental smoking is not only negative for children's lung function, but poses a risk for their future cardiovascular health." In an extension of a standard school health exam, 4,236 kindergarten boys and girls (average age 5.7) in the German district that includes Heidelberg had their blood pressure measured. Of parents reporting they smoked, 28.5 percent were fathers, 20.7 percent mothers and 11.9 percent were both parents. Children with a smoking parent were 21 percent more likely to have systolic blood pressure (the top number in a reading, measured as the heart contracts) in the highest 15 percent, even after adjusting for other heart disease risk factors, such as birth weight, body mass index, and hypertension in the parents. "Passive smoking increased the risk of having blood pressure at the upper end of normal, and some of these children already had high blood pressure," Simonetti said. After correcting for other risk factors — having parents with high blood pressure, being born prematurely or at a low birth weight, being overweight or obese — blood pressures were significantly higher in the children of smoking parents. The impact was greater for systolic blood pressure (average increase 1.0 mm Hg) than diastolic blood pressure (average increase 0.5 mm Hg), the lower number in a reading measured when the heart rests between beats. "Smoking adds to other risk factors," Simonetti said. "Average blood pressure increased in proportion to the cumulative number of risk factors present." Smoking by mothers had a larger impact than fathers smoking, probably because more of their smoking was done in the home while fathers smoked more at their workplaces, researchers said. Smoke exposure is likely to have a similar impact on blood pressure in children in the United States, the researchers said. "Childhood blood pressure consistently tracks into adult life," Simonetti said. "Removing any avoidable risk factors as soon as possible will help reduce the risk for heart disease later on and improve the long-term health of children." The study findings suggest that encouraging strictly smoke-free environments, specifically at home, may help preserve cardiovascular health not only in adults but also in children, researchers said. INFORMATION:

Co-authors are: Rainer Schwertz, M.D.; Martin Klett, M.D.; Georg F. Hoffman, M.D.; Franz Schaefer, M.D.; and Elke Wühl, M.D. Author disclosures are on the manuscript. The Manfred-Lautenschläger Stiftung, Reimann-Dubbers-Stiftung, Dietmar-Hopp-Stiftung and the Swiss Society of Hypertension AstraZeneca scholarship funded the study.

Statements and conclusions of study authors published in American Heart Association scientific journals are solely those of the study authors and do not necessarily reflect the association's policy or position. The association makes no representation or guarantee as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events. The association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and device corporations are available at www.americanheart.org/corporatefunding.

Editor's Note: The American Heart Association supports adequate funding for state tobacco cessation and prevention programs, robust coverage in private and public health plans for tobacco cessation, clean indoor air laws and excise taxes. www.heart.org/tobaccocontrol.

Additional resources: Smoking and Cardiovascular Disease Downloadable stock footage, animation and our image gallery are located at www.heart.org/news under Multimedia.



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[Press-News.org] Smoking around your kindergartner could raise their blood pressure
American Heart Association rapid access journal report